The FNSKU: one label per unit
Every unit sent to FBA needs a scannable barcode that ties it to your seller account. For most sellers that is the FNSKU (starting with X00...), printed on a white label that fully covers any other scannable barcode on the product. Manufacturer barcodes (UPC/EAN) are only acceptable if your listing is set to commingled/virtually tracked inventory — most private-label sellers should use FNSKU labels.
- One FNSKU label per unit, flat and scannable
- Cover all other barcodes completely
- Label on the outside of any poly bag or box
- No labels on curves, seams or openings
- Print quality must survive handling
